EP3055188A1 - Arbre de direction destiné à la direction d'un véhicule automobile - Google Patents

Arbre de direction destiné à la direction d'un véhicule automobile

Info

Publication number
EP3055188A1
EP3055188A1 EP14780758.0A EP14780758A EP3055188A1 EP 3055188 A1 EP3055188 A1 EP 3055188A1 EP 14780758 A EP14780758 A EP 14780758A EP 3055188 A1 EP3055188 A1 EP 3055188A1
Authority
EP
European Patent Office
Prior art keywords
bearing
torsion bar
output shaft
shaft
conical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14780758.0A
Other languages
German (de)
English (en)
Other versions
EP3055188B1 (fr
Inventor
Csaba HEGEDÜS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
ThyssenKrupp Presta AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Presta AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp AG, ThyssenKrupp Presta AG filed Critical ThyssenKrupp AG
Priority to PL14780758T priority Critical patent/PL3055188T3/pl
Publication of EP3055188A1 publication Critical patent/EP3055188A1/fr
Application granted granted Critical
Publication of EP3055188B1 publication Critical patent/EP3055188B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
    • B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
    • B62D5/083—Rotary valves

Definitions

  • the present invention relates to a steering shaft for a motor vehicle steering system for use with a power assistance, comprising an input shaft and an output shaft, which are rotationally elastic connected to each other for transmitting a torque by means of a torsion bar, preferably for use with an electric power assist.
  • auxiliary power assistance to apply an auxiliary torque for steering assistance of the driver on the steering shaft.
  • assisted vehicle steering systems to divide the steering shaft of the motor vehicle into an input shaft and an output shaft, wherein the input shaft is usually connected to the steering wheel of the motor vehicle, via which a driver enters the corresponding steering torque or the corresponding steering command into the input shaft.
  • the output shaft is usually connected to the steering pinion, which transmits the steering movement to the steered wheels of the motor vehicle via a corresponding rack and tie rods.
  • Auxiliary power assistance such as electric power assistance or hydraulic power assistance, are usually applied to the input of the corresponding auxiliary torques on the output shaft, the steering pinion or on the rack.
  • the respective auxiliary power assistance is activated via the determination of the torque entered by the driver via the steering wheel into the input shaft relative to the output shaft.
  • CONFIRMATION COPY Power steering this can for example take place via a rotary valve, in an electric power steering, for example via corresponding magnetic sensors.
  • the rotationally secure connection of the torsion bar with the input shaft and / or the output shaft is important to the functioning of the corresponding torsionally flexible connection between the input shaft and the output shaft, which ultimately allows the sensing of the torque.
  • the torsion bar is usually associated with the input shaft and / or the
  • a steering shaft for a motor vehicle for use with a
  • Assistive force proposed comprising an input shaft and an output shaft, which for the transmission of torque by means of a torsion bar torsionally with each other are connected, wherein the torsion bar is supported by means of a bearing on the input shaft and / or the output shaft.
  • the bearing is conical.
  • Vibration behavior of the entire steering shaft can be improved. Accordingly, the noise contribution, which originates from the steering shaft can be reduced or eliminated completely.
  • the bearing comprises a conical bearing portion on the torsion bar.
  • the bearing comprises a conical bearing section of the input shaft and / or the output shaft. Accordingly, here a sliding bearing can be formed so that the conical bearing portion of the torsion bar with the conical bearing portion in the
  • Input shaft and / or output shaft is formed corresponding to and corresponding to a bearing with a predetermined clearance is formed by the torsion bar in the
  • Input shaft and / or the output shaft are moved so far against each other so far that over the conical connection region according to a predetermined bearing clearance is achieved.
  • the bearing preferably comprises a rolling bearing, particularly preferably a needle bearing, with rolling elements, wherein the rolling elements are particularly preferably held by an elastic bearing cage.
  • a rolling bearing By using a rolling bearing, the hysteresis in the steering shaft can be kept low.
  • the rolling elements of the rolling bearing directly on a bearing portion of the torsion bar and / or directly on a bearing portion of the input shaft and / or the
  • the rolling elements are cylindrical and are accommodated between a conical bearing section on the torsion bar and a conical bearing section in the input shaft and / or the output shaft.
  • the conicities of the conical bearing sections are preferably identical.
  • Wälzkörpem can be achieved with a simple needle roller bearing the beneficial effects of the conical bearing.
  • the rolling elements are conical and received between a bearing portion on the torsion bar and a bearing portion in the input shaft and / or the output shaft, wherein the bearing portions preferably have different Konizticianen.
  • the formation of the bearing sections can be simplified.
  • the bearing portion in the input shaft and / or the output shaft may be cylindrical and only the bearing portion on the torsion bar must be conical.
  • either the bearing portion on the torsion bar or the bearing portion in the input shaft and / or the output shaft can be cylindrically shaped, and the respective other bearing portion is then formed conically according to the cone of the conical rolling elements.
  • both the bearing portion on the torsion bar and the bearing portion in the input shaft and / or output shaft are conical, and the rolling elements are also conical, wherein the respective cone on the bearing portion on the torsion bar and on
  • Bearing portion in the input shaft and / or output shaft is adjusted according to the cone of the rolling elements.
  • Torsion bar and the conical bearing portion in the input shaft and / or output shaft corresponding rolling elements are present, which roll on the bearing portions.
  • the rolling elements are preferably connected to one another via an elastic bearing cage, so that they are freely adaptable to the corresponding conical bearing section. In this way tolerances are minimized.
  • the bearing comprises a conical bearing section on the torsion bar and a complementary bearing section in the input shaft and / or in the output shaft, and the two conical bearing sections form a slide bearing, the conicities of the two conical bearing sections are preferably identical.
  • the advantageous effects of the conical bearing can be achieved even with a plain bearing.
  • the plain bearing can be adjusted in a simple manner so that rattling does not occur or is at least greatly reduced.
  • the input shaft and / or the output shaft are pressed against rotation with the torsion bar.
  • a first rotationally fixed connection between the input shaft and / or the output shaft are pressed against rotation with the torsion bar.
  • Torsion bar and, for example, the input shaft carried out so that the input shaft receives the torsion bar in a corresponding bore, and is rotatably pressed in the bore of the torsion bar in a corresponding joining receptacle.
  • Bearing portion in the input shaft comprises.
  • the two conical bearing sections are so during the
  • the slope of the cone is preferably selected so that it is tapered in the press-fit direction to bring the respective bearing sections in juxtaposition when pressing the torsion bar into the input shaft so that a predetermined game is achieved.
  • This design also has the advantage that the rolling elements are held between the input shaft and the torsion bar, such that they do not fall out in the further assembly process. This simplifies the further assembly of the steering shaft to the effect that during subsequent joining of the torsion bar with the output shaft, any positioning of the two parts to be joined together can be made, without having to pay attention to falling out of the rolling elements.
  • connection is made exclusively by compression and it is dispensed with an additional backup, for example, by sapwood or pin or bonding.
  • a method for producing a steering shaft comprising an input shaft and an output shaft, which are connected to transmit torque by means of a torsion bar torsionally elastic, wherein the torsion bar is supported by means of a bearing on the input shaft and / or the output shaft.
  • a conical bearing is provided on the torsion bar and the torsion bar is non-rotatably pressed with the input shaft and / or the output shaft in such a way that the play of the bearing is adjusted by the compression, preferably adjusted without clearance.
  • Figure 1 is an exploded view of a known steering shaft for a motor vehicle steering system
  • FIG. 2 is a schematic perspective view of the steering shaft of Figure 1 in one
  • Figure 3 is a sectional view through the steering shaft according to Figures 1 and 2 in the assembled state
  • Figure 4 is a schematic perspective view of a portion of a torsion bar and a bearing according to an embodiment of the present invention
  • Figure 5 is a schematic perspective view of a steering shaft according to another
  • Embodiment of the present invention in a pre-assembly state
  • Figure 6 is a schematic side view of a portion of the torsion bar and the input shaft of Figure 5;
  • Figure 7 is a schematic side view of a torsion bar and a bearing in a further embodiment;
  • Figure 8 is a schematic sectional view through a storage area of a torsion bar in a steering shaft.
  • a steering shaft 1 according to an embodiment known from the prior art is shown schematically in FIGS. 1 to 3.
  • the steering shaft 1 comprises an input shaft 2, an output shaft 3 and a torsion bar 4 connecting the input shaft 2 and the output shaft 3 in a torsionally flexible manner.
  • the torsion bar 4 has at its one end a first joining portion 40, which is joined with a corresponding, complementary thereto mating receptacle 30 in the output shaft 3, for example by pressing.
  • the torsion bar 4 also has a second joining portion 42, which with a corresponding, complementary thereto mating receptacle 22 in the
  • Input shaft 2 is joined, for example, also by pressing.
  • the torsion bar 4 is received in large part in a bore 34 extending in the axial direction of the output shaft 3 in the output shaft 3.
  • the torsion bar 4 is pressed against rotation with the output shaft 3 only in the area of its joining section 40.
  • the torsion bar 4 is pressed against rotation with a joining receptacle 22 of the input shaft 2.
  • the remaining area of the torsion bar 4 can be rotated or twisted relative to the output shaft 3.
  • the still protruding from the bore 34 in the output shaft 3 end of the torsion bar 4, which inter alia the joining portion 42 for joining with the joining receptacle 22 in the Input shaft 2 is mounted in the output shaft 3 by means of a bearing 6.
  • the bearing 6 comprises in the embodiment shown in a known manner a roller bearing 5, a arranged on the torsion bar 4 cylindrical bearing portion 44 and disposed in the output shaft 3 cylindrical bearing portion 36, wherein the rolling elements 50 of the rolling bearing 5 between the two bearing portions 36 and 44 are arranged are and roll on this. Accordingly, the torsion bar 4 is guided by the bearing 6 in the radial direction, a torsion of the torsion bar 4 relative to the output shaft 3, however, can easily take place.
  • the bearing 6 can either be designed as a slide bearing or - as shown - as a rolling bearing 5.
  • the bearing 6 in the form of a
  • Needle bearing formed in which the individual rolling elements 50 are cylindrical.
  • the bearing 6 is therefore arranged between a cylindrical bearing portion 44 of the torsion bar 4 and a complementarily positioned, also cylindrical bearing portion 36 of the output shaft 3.
  • the rolling elements 50 of the bearing 6 roll directly on the surface of the torsion bar 4 in the region of the bearing portion 44 and directly on the surface of the output shaft 3 in the region of the bearing portion 36. In other words, are no
  • the steering shaft 1 may tend to emit undesired noises.
  • the torsion bar 4 which is clamped only in the region of its joining sections 40, 42 and is guided radially by the bearing 6, on occurrence of tolerances in the bearing 6 can generate rattling noises when the torsion bar 4 is excited to vibrate, for example, by driving influences.
  • the tolerances in the bearing 6 can either by deviating diameter of the rolling elements 50, different outer diameter of the bearing portion 44 of the torsion bar 4 or deviating inner diameter of the
  • Bearing portion 36 of the output shaft 3, or a combination of these three occur.
  • the bearing 6 is conical.
  • the bearing portion 44 is formed on the torsion bar 4 conical.
  • the bearing 6 also includes a rolling bearing 5, which is designed as a needle bearing, and in which the rolling bodies 50 are formed substantially cylindrical.
  • the rolling elements 50 are held in an elastic bearing cage 52 so that when pushing or pressing the rolling bearing 5 on the conical
  • Bearing portion 44 of the torsion bar 4 according to a concern of the rolling elements 50 is achieved at the bearing portion 44.
  • the axes of rotation of the rolling elements 50 are correspondingly no longer aligned parallel to each other, but they follow the taper of the conical bearing portion 44th
  • a complementary bearing portion 36 for example in the input shaft 3, as shown for example in Figure 3, then preferably has the same conicity as the
  • bearing portion 44 In order to accommodate the rolling elements 50, the bearing portion 36 is extended in the output shaft 3 but by the predetermined by the rolling elements 50 enlarged diameter.
  • Bearing portion 44 are slid over resting, wherein the rolling elements 50 are then arranged between the conical bearing portion 44 of the torsion bar 4 and a complementary conical bearing portion 36 of the output shaft 3.
  • the clearance in the bearing 6 can be adjusted due to the conical design of the bearing 6. For example, here with a predetermined press-fit force of the torsion bar 4 are pressed into the output shaft 3, that a play-free bearing 6 is achieved. In this way, rattling can be reduced or completely eliminated, since there is no - or only marginal - play in the area of the bearing 6.
  • the torsion bar 4 from FIG. 4 is shown once more in a state in which it has already been pressed with an output shaft 3.
  • the conical bearing portion 44 is clearly visible, as well as the rolling bearing 5, which in turn is designed in the form of a needle bearing so that the rolling elements 50 are formed substantially cylindrical and are held in an elastic bearing cage 52.
  • the bearing portion 36 on the output shaft 3 is conical, such that the rolling elements 50 are held between the conical bearing portion 44 of the torsion bar 4 and the conical bearing portion 36 of the output shaft 3.
  • FIG. 6 again shows the situation shown in FIG. 5 in a schematic side view, the bearing 6 with its rolling elements 50 being shown.
  • the bearing 6 can not be directly seen with the bearing portion 44 of the torsion bar 4 and a in Figure 6
  • Torsion bar 4 are connected to the output shaft 3.
  • a torsion bar 4 is shown, which in turn has a conical bearing section 44.
  • the bearing 6 here has rolling elements 50, which are conical.
  • the conicity of the rolling elements 50 may be such that they are opposite to the taper of the bearing portion 44 and the conicity
  • an opposing bearing section 36 accommodating the rolling bodies 50, for example in the output shaft 3, may also be cylindrical.
  • Bearing portion which is provided in the output shaft 3, are drilled cylindrically, whereby the production is further simplified.
  • an output shaft 3 is shown in a schematic sectional view, in which a torsion bar 4 is inserted, and in which a bearing 6 is provided with rolling elements 50, to support the torsion bar 4 against the output shaft 3 rotatably.
  • the rolling elements 50 are designed in the form of a needle bearing and are each cylindrical.
  • the cylindrical rolling elements 50 roll on the one hand on a conical bearing portion 44 of the torsion bar 4 and on the other on a conical bearing portion 36 of the output shaft 3rd bearing shells are not present in the illustrated embodiment, but the rolling elements 50 roll directly on the material of the output shaft 3 and Torsion bar 4 off.
  • Bearing portion 36 are the same, so that takes place automatically when pressing the torsion bar 4 in the output shaft 3, a compression of the rolling elements 50 of the bearing 6. Accordingly, the smaller diameter portion of the conical bearing portion 44 of the torsion bar 4 is disposed at the end of the torsion bar 4, which shows the torque rod 4 in the press-fitting direction.
  • roller bearing 5 is held firmly between the output shaft 3 and the torsion bar 4 after pressing the torsion bar 4 in the output shaft 3, such that the individual rolling elements 50 are arranged on the one hand substantially free of play, and on the other hand due to the conical bearing sections 36, 44 are also positively locked so that they can not fall out.
  • a subsequent assembling, for example, a pressing with an input shaft significantly simplify, since it
  • Bearing portion 36 of the output shaft 3 at least achieved that the bearing 6 can be installed substantially free of play, and on the other hand, the rolling elements can be held firmly.
  • a sliding bearing is provided instead of the rolling bearing 5, in which case the conical bearing portion 44 of the torsion bar 4 slidably bears against the conical bearing portion 36 of the output shaft 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Steering Controls (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne un arbre de direction (1) d'un véhicule automobile, destiné à être utilisé avec un système d'assistance et comprenant un arbre d'entrée (2) et un arbre de sortie (3) qui sont reliés l'un à l'autre de manière élastique en torsion au moyen d'une barre de torsion (4) pour la transmission d'un couple. La barre de torsion (4) est montée sur l'arbre d'entrée (2) et/ou l'arbre de sortie (3) au moyen d'un palier (6). Le palier (6) est de forme conique.
EP14780758.0A 2013-10-07 2014-09-26 Arbre de direction destiné à la direction d'un véhicule automobile Active EP3055188B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14780758T PL3055188T3 (pl) 2013-10-07 2014-09-26 Wał kierownicy do mechanizmu kierowniczego pojazdu silnikowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013111082.7A DE102013111082A1 (de) 2013-10-07 2013-10-07 Lenkwelle für eine Kraftfahrzeuglenkung
PCT/EP2014/002611 WO2015051886A1 (fr) 2013-10-07 2014-09-26 Arbre de direction destiné à la direction d'un véhicule automobile

Publications (2)

Publication Number Publication Date
EP3055188A1 true EP3055188A1 (fr) 2016-08-17
EP3055188B1 EP3055188B1 (fr) 2017-11-08

Family

ID=51660427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14780758.0A Active EP3055188B1 (fr) 2013-10-07 2014-09-26 Arbre de direction destiné à la direction d'un véhicule automobile

Country Status (5)

Country Link
EP (1) EP3055188B1 (fr)
DE (1) DE102013111082A1 (fr)
ES (1) ES2657762T3 (fr)
PL (1) PL3055188T3 (fr)
WO (1) WO2015051886A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11511786B2 (en) 2019-09-04 2022-11-29 Steering Solutions Ip Holding Corporation Rattle noise reducing electric power steering column assembly and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843592C3 (de) * 1978-10-06 1981-11-19 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Hilfskraftlenkgetriebe
DE19752468A1 (de) 1997-11-27 1999-06-02 Mercedes Benz Lenkungen Gmbh Drehschieberventil für Servolenkungen und Verfahren zu dessen Herstellung
DE19856251C2 (de) * 1998-12-08 2002-10-31 Mercedes Benz Lenkungen Gmbh Rückwirkungsanordnung an einer Servoventilanordnung
DE19935283A1 (de) * 1999-07-27 2000-11-02 Zf Lenksysteme Gmbh Elektrisch unterstützte Hilfskraftlenkung für Kraftfahrzeuge
DE102010039125A1 (de) * 2010-08-10 2012-02-16 Zf Lenksysteme Gmbh Lenkwelle für eine Lenkeinrichtung in einem Fahrzeug
DE102011054983B4 (de) 2011-11-02 2024-02-01 Robert Bosch Gmbh Sensorbaugruppe für eine elektrische hilfskraftlenkung

Also Published As

Publication number Publication date
PL3055188T3 (pl) 2018-04-30
EP3055188B1 (fr) 2017-11-08
DE102013111082A1 (de) 2015-04-09
ES2657762T3 (es) 2018-03-06
WO2015051886A1 (fr) 2015-04-16

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